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    DG Heating & Air Conditioning

    4.7 (335 reviews)
    Closed • 8:00 am - 4:00 pm
    Updated 2 months ago

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    5 hours

    Response rate

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    Reviews With Photos

    Old Gas Furnace
    Matthew A.

    I talked to Jim to get a quote on upgrading from gas to heat pump AC. I live in a Manufactured Home and I don't have many Amps of electricity going to my unit. Jim came and looked at my setup. Not only did he recommend an AC Heat pump unit I was looking at online but he also said he would help as much as possible with getting rebates through. I called multiple AC people for quotes and they gave a wide range of prices. Jim's price was fair and he was willing to help me get money back. And he really did. He filled out the needed paper work for me for a certificate that I then provided to Silicon Valley Clean Energy for the rebate.

    Lester J.

    Excellent customer service and superior work! DG came highly recommended by a friend who also had Furnace/AC/Water Heater work done 3 years ago. EVERY single person I encountered with DG from start to finish was amazing. It began with the initial phone call with Raelene. She and her coworker Tina are so pleasant to talk to. Attentive, polite and patient. An estimation visit was scheduled with Richard. He was punctual, quick, honest and knew exactly what we needed. An accurate written estimation was provided to us as promised the very next day. I told DG I needed to get a few other estimations first before I make a decision. They assured me to take my time and never bothered or pressured me to use them. OTHER contractors we inquired with were arrogant, impatient and kept pestering us to utilize them. When decision time came, we confidently chose DG. Before making the installation appointment, I had some concerns and items that I wanted to be put in writing on the contract. Raelene and Tina listened and addressed every request I made. They promptly emailed me a revised contract that I was happy with. The day of the installation, the workers showed up promptly...actually 5-10 minutes early which was great. They were ALL friendly, competent and very CLEAN. They respected our property outside AND inside. Unlike some contractors, they did NOT leave garbage around, put dirty hand prints everywhere, step all over the place with their dirty shoes/boots, etc. They were always careful and they meticulously abided by Covid 19 protocols. You can trust them completely during this pandemic time. I'm a clean person with a very clean house...and after the work, it was as if they were never there! Another special thanks to Jose who went out of his way to help us clean our sky window in one of our rooms since he had a long ladder available. That was very kind of him to do that. The install was done on time and as promised. Actually they finished 1.5 hours early! I did not have my checkbook handy to pay at the time, so I called their office to see if I can drop a check off the next day. They told me absolutely no problem. The following day when I did that, one of owners John took time to come out to say HI. This ended a very great experience. Anyways, this is a very long review but I wanted to share it. I hope this helps others in their contractor choice. DG is Highly Highly Recommended!!

    Water dripping via vent after heater turns on. One dark appeared after leaking.

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    Ron, glad we could help you out. Let us know if you need anything!

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    Page 1 of 9

    Ask the Community - DG Heating & Air Conditioning

    Hello, I bought an air conditioner online, it is a mini-split. now I need to find some professional people to help me install it in my room. Can you give me a free quote?

    If you would please call our office at 408-201-9411 Leticia will be able to set up a time for John to come out and take a look at the type of install you are looking for. We can then provide you with a quote.… 

    View All 2 Questions

    Review Highlights - DG Heating & Air Conditioning

    “John (one of the owners) swung by to make sure everything was going as planned and ask if we had any questions.”

    Mentioned in 80 reviews

    Read more highlights

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    Santa Teresa

    I had a new HVAC system installed about 5 years ago by HVACerz. Very pleased with the installation…read moreand the crew was very professional. I had shopped around and found them to be very competitive and they had a solid reputation. The unit has been working flawlessly ever since the installation but though it was time for a maintenance/checkup. I called for an appointment and was quoted $95 for a checkup... I thought that was reasonable considering it had been over 5 years since the installation. The owner, Barsin stopped by and did a thorough inspection, checked the refrigerant, condenser, inspected the main unit, filter etc. all was well which I suspected but just wanted to be sure. He even popped his head into the attic to look at some of the duct work which is the original to the house but still functioning. When he completed the inspection I asked him how he would prefer to be paid and he said "No Charge", everything is working as it should so you are go to go... I thought that was pretty swell:). Anyway, just thought I would pass along a very good HVAC service/ company in the South bay for those looking for a competitive price, quality products and great service... Even after sale service!

    Got HVACerz from Yelp because of their high ratings, and the experience fully lived up to it…read more Barsin contacted me and came to my house for an estimate. He carefully checked my existing furnace and walked me through different options in a very professional and detailed way. In the end, we went with the option he recommended, and the entire process was totally transparent from start to finish. The installation crew arrived on time and kept me informed of their progress without excessive back-and-forth messages. Both Nahira and Rolando handled the removal of the old unit and the installation of the new one smoothly. After the job was done, they clearly explained how to use and maintain the new system.

    Air Sharks - Air Sharks team

    Air Sharks

    (101 reviews)

    Newhall, North San Jose

    UPDATE 8/11: After I posted this review, I was contacted…read morenext day by a manager and then also the owner. The owner actually left a voicemail and I eventually called back. The owner apologized, wasn't defensive, didn't try to get to me explain my self and was just apologetic to what I experienced. They offered partial refund and service to show that they want to fix the wrong and prove that they are a great service company. ------ Original review: I had a very negative experience with air shark technician. My issue was needing the capacitor replaced. The fix was quick and I was clearly over charged. When I asked about this, the technician just said it's just business. He exaggerated the price of the part needed which is a capacitor saying it's like $200-$300. It's at most $50. It took him like 10 minutes to replace the part and said you either accept the charge and pay or I just take it out. It felt very predatory, like I already fixed it you might as well pay. He proceeds to measure temps and other various things just to pass time while he waits for me to decide if I want to pay or have him unfix it. I can accept being over charged but something about how this situation transpired left a bad taste for me. For example, why wouldn't you say you need to replace this and it cost this much for the fix instead of fixing it first then say pay or I take it off.

    We replaced our entire HVAC system with a Daikin 4-ton heat pump and went with Air Sharks after…read moregetting a few quotes. No regrets. The quoting process was straightforward -- no pressure, no mystery line items, and they actually explained the equipment options instead of just pushing the most expensive thing. Install crew was on time, respectful of the house, and left the place clean. Where they really stood out was everything after the install. Anyone who's done a permitted HVAC job knows the paperwork is where contractors go quiet. Not here. HERS testing forms, city inspection scheduling, warranty registration, and the maintenance plan were all sorted out. Hyman, Jean, and Khaled were each responsive whenever I needed something. No chasing, no dead ends. The system has been running well and the house is noticeably more comfortable. Easy recommendation.

    Calvey Heating and Air

    Calvey Heating and Air

    (536 reviews)

    Years ago the apartment complex I lived at contracted Calvey to install mini-split A/C in the…read moreapartment I was in. The install was amazing quality! So much so that it gave me the confidence to buy my first home without A/C because I knew I could just call Calvey. A few years later I did just that. Damn, it's been a couple of months now and I've been able to control the climate of my entire house from my phone, optimizing the temperature and sometimes making it as low as 66F to just enjoy the air being crisp. The install has been fantastic quality and the crew listened to everything I wanted every step of the way. They mounted rat spikes where I wanted, they put the lines and the units exactly where I asked and I've had no issues at all. I truly believe with home price comparisons in my area that I made money off of the install because it increased my home value. My golden retriever is happy, I am 100% happy and I will see you guys again next home upgrade. :)

    Quite unimpressed. Called and spoke to their receptionist girl, who was ok, seems to not know much,…read moredeflects questions and avoids clear answers, but that's not the problem. I send plans and followed up more than twice with direct emails and voicemails. Nothing. No call, no text, no email. No response at all. Clowns! Maybe they're too busy filming awful commercials lol... call them and that's what you'll be paying for! These guys may be ok, but I'll never know and I'll never call them again because they're very unprofessional. They misrepresent 'free estimates'... liars. Find someone else is my recommendation! Bad service, zero communication. FAIL.

    Global Heating And Cooling Services

    Global Heating And Cooling Services

    (695 reviews)

    Willow Glen

    I am reposting my review with Global heating because it looks like my first one about three months…read moreago got taken down for whatever reason Yelp decided. John was amazing when he came over to my house. I had previously interviewed and hired two other contractors to come in to look at my AC unit and they did not know what the hell they were doing. By the time, I finally reached John, he knew exactly what was wrong! He is super honest and his price was amazing depending on what your issue is with your AC. My issue was I needed a new compressor which the other two bozo clowns couldn't figure out. My only regret is that I wish I found John as my first contractor instead of interviewing and working with the other two bozos! I live in Newark. Thanks for coming out this way to make my day a whole lot better now that I have a working AC unit.

    I had an issue with an older A/C unit that multiple other providers looked at and couldn't figure…read moreout. Giovanni came in, diagnosed the problem, and found a creative solution that actually worked -- no "you need to replace the whole unit" runaround, just genuine expertise and a willingness to think outside the box. What really stood out beyond the technical skills was how accommodating and flexible he was throughout the whole process. He worked around my schedule, kept things stress-free, and was friendly and easy to talk to from start to finish. You can tell he actually cares about doing right by the customer rather than just closing a ticket. Global Heating and Cooling Services has earned a loyal customer.

    DG Heating & Air Conditioning - hvac - Updated September 2026

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